George h



UNITED STATES PATENT OFFICE.

GEORGE H. F. SOI-IRADER, OF NEW YORK, N. Y.

VALVE.

SPECIFICATION forming part of Letters Patent No. 505,486, dated September 26, 1893.

Application filed February 9, 1893. Serial No. ll.61,251. (No model.)

' in the city, county, and State of New York,

have invented certain new and useful Im. provements in Valves, of which the following is a specification.

This invention relates to valves, particularly to air valves for pneumatic bicycle tires, and is designed to provide certain improvements in such valves which will be fully hereafter set forth.

In the accompanying drawings, Figure 1 is an axial section of the preferred form of my improved valve, a fragment of the tire being shown in section and the coupling of an air pump pipe shown attached to the valve. Fig. 2 is a section of a slightly modified construction of valve to which the usual cap is applied. Fig. 3 is a similar section of another modified construction of valve and Fig. 4. shows another modification.

Referring to the drawings let A represent the valve as a whole, B a bicycle tire or other vessel to which the valve is applied, and C a pump coupling for feeding the valve.

Referring to Fig. 1 the valve A consists of a tubular casing D and a plunger E within said casing for controlling communication through the valve, the one being movable relatively to the other.

The casing D is preferably constructed with a fiange F at its lower end projecting laterally within the tire B and suitably clamped against the inner face thereof, and from this flange the outer wallof the casing rises in the form of a screw-threadedsurface a, terminating at top in a socketed face b. From this face b an aperture c extends inwardly and communicates with an enlarged cylindrical space d within the socket, which Acontinues through to the lower end of the socket and' at its lower end is constructed with an internal screw thread e. A washerG fits over the screw thread ot of the casing and lies against shoulder leaves a square corner f at its junction with the aperture, which corner constif tutes the valve seat of the casing.

The plunger E has a conical seating face g within the casing and acting against the seat f of the latter, for closing the valve. Above this face g it is provided with a smooth cylindrical stem 71, rising through the aperture c and projecting beyond the outer face of the casing to permit manipulation of the plunger. Below the face g the plunger is con structed with an enlarged cylindrical portion nearly lling the space d of the casing and extending sorne distance downwardly therein. This portion his constructed with a hollow interior i, open at its lower end.

A plug I is screwed into the lower end of the casing engaging the screw thread e thereof. vThis plug has a reduced cylindrical npward projection J loosely fitting the hollow '1l in the plunger E for guiding the latter. cross groove le is formed in this guiding projection J, and an axial hole Z is tapped in the plug I to communicate with this groove. Thus through the hole and groove there is communication between the interior of the tire and `the interior of the casing D. A spring K within the hollow c' acts at its lower end against the plug I and at its upper end against the plunger to force the latter to the closed position. A lug m is struck inwardly from the lower edgevof the wall of the end h of the plunger, which lug enters the groove 7e in the plug I to prevent relative rotation of the parts. In this construction the outer end of the stein h of the plunger is provided with an enlarged exteriorly screw threaded head M, onto which screws a handle nut N. This nut has a lip n which is turned inwardly around the stem h to overh-ang the head M thereof and thereby prevent separation of the nut and. plunger. Below this lip the nut N has a seating face o. A washer P of packing material is seated in the socket b, loosely surrounding the stem h and extending close to the screw threaded outer wall of the casing.

In operation the plunger and casing are locked against rotation by the lugm which engages the groove 7c in the plug I. The conduit through the valve extends through the hollowplugland its groove 7o into and through the space d within the casing around the part valve is in closed position the'nut N is screwed down tightlyagainst the Washer P, thus making an air tight joint between the face b of the casing and the nut, and simultaneously drawing the seating face g into intimate contact with the seat f. When thus screwed down thenut N distorts the rinnenportfion' ofthe washer tightly against-the smooth cylindricall wall of the shank h, thus also making a closure at this point. When the valve is open Vthenu't N is screwed away from' the washer andl the plunger and nut-*can oscillate to? gether under the action of the intlowing air and the closing action of the' spring K. Z'When the pump coupling C isjapplied it is 'screwed onto the screwthread a" of the -casing Bun- "til its internal shoulder p tightly engages the packing washer P carried on theend thereof.

Thus an airtight joint is made between the coupling and valve." The nut N is ofsuch size that it passes'freelywithin the coupling C's'o lthat. the 'latter can be applied without removing the nut and there'will be sufficient spacefor' the' passage of air within thec'ou'pling around the nut.

Y the open position the'coupling G will be apl plied andthe intlowingv air from --thepump will shiftJ the plunger sufficiently to .'.permit "the passage'of the air into theicasing. When the plunger againstthe seat'f, whereupon the P lorfby grinding the faces'ofthe nut andcasthe inflow ceases the spring K in conjunction with the pressure IWithin'the casingwill seat coupling C can be removed" and the valve made pernzianentlj7 tight by screwing thehand nut N home. The ha'nd'nut'N ispreferablyl A'an imper-forate metal cap, 'whereby 'therel is. no opportunity for leakage through its screw thread'connection with the stem. i Thus the only leakage' joint for the valve is at the seating face o'of' the nut, 'which cansbe ',re'adil'y made air tightbyrthe use of va packing washer fing.' It is preferable tof-use the washer, and

to grind vthe face g of the plunger andthe seaft f of the casing for additional security. i

It will be seen that my invention provide an `extremely simple land effective air valve which can be successfully.constructedof'very small sizes, as required forbicycle valves; it will also be seen that theinvention dispenses with the necessity of using asoft packingr material within the valve, and'of using .the

l usual cap for enveloping' the working parts.

It will be understood that the invention is not limited to'the precisedetails of construction and arrangement' shown inFig. l, as'

-' these may be variously modified as circumfor `making a tight" joint. 4this h'construction is the lsameas described llair to Fig-1, but differing' therefrom in that 'thercasing here lettered D is constructed with a tapering seat lettered f and with internal guide grooves lettered q, the plunger being constructed with outwardly turned lugs letventing relative rotation of parts. At its outer end the plunger has a shank lettered h smooth at its lower part and screw threaded at M', onto which screw threaded end the hand nut lettered N is screwed, the nut and shank being detachably Iconnected together in this instance. The usual cap Q is here shown screwed on to the end of the casing and havingy a shoulder r engaging the outer edge ofL the packing washer here lettered D The koperation of "a'nd'handnut In thisconstru'ctio'n thel plunger here lettered E2 has groovess atits lower end," and .the'l'plug *lettered* Ighas lateral; lugs mzengaging these'groeves to'preventrotation 'of' the plunger. 'TA screw? threadedy 'hole't is provided in the 'upper endofthe'plungerand the hand nut here letteredNz' hasr'a screw threaded 'shank lettered 'entering :this hole f and engaging the` screw threads thereof. The After the'nut has `beenl screwedY to *nut screws its sh'ankinto'or out'of theplungeran'd therebyopensor closes'thelvalve.

'f SFig. 4 shows a modification of the handnut adPhmgGr-" The" Stemfhere lettered h3; is 'screw threaded and "constructed Wi'thaflat side u formed `by"ti'ling"oft onefof its sides, and'` ythe #aperture lettered c3l has a shoulder orinwardproj-ection d corresponding to the side wand -"preventing rotation? of the shank relatively to the casing. 'lhenutY-herelettered N3 is'an'ordinary nut throughwhic'litlre'stem passes. Theju pper end'ofthe stem isswaged over topr'e'ventremoval of thenut. In this construction the' seaitingv fface' gs'ofzthe lstem and the seat fsof thecasingaregroundto make' an air tight't vand jaref relied on for the closure ofthe` valve. In operation these faces are brought .intof intimate i contact ,by rotationof'the nut N3.

i fWhat Iclain'l' is, in 'a"valve,"th'e' followingdefined features. andA combinations,` substantially as hereinbefore set forth', namely:

' l". Ina bicycle tire valve, the casin'gD,hav ing an yinternalseating face, and an outlet ,aperture c, in'combination vwith a plunger E "of said stem for operating the plunger^,^where vby the separation of thes'temjandnut is'prevented. v v

2; In an air valve, the casing D, having hol-s IOO IIO

. 10W interior CZ, aperture c, and internal seat- 5 f, said plunger having a reduced stem extendzo plunger E movablylnounted within" said cas-M p ing outside of the casing and an enlarged screwthreaded outer end fm exteriorly of said casing, and a nut having an internal screwthread engaging that of said Stem for operating it, and having an inward projection nopposite said reduced stem and projection in the path of the screwthread m thereof, Whereloy separation of the nut and stern is prevented.

3. In a bicycle valve, the casing D, having hollow interior. cl and 'screwthread e at the` lower end thereof, in combination with a slotted plug I entering the end of said casing and engaging the screwthread e thereof, and `a ing, and having a lug m engaging the slot of said plug and preventing rotation of said plunger, substantially as and for the purpose set forth.

4. In a Valve the casing D in combination with the plug I fitting the hollow interior thereof and having guiding projection J, the plunger E within said casing having enlarged end h and hollow portion t itting over said projection J and guided thereby, anda spring K for said plunger Within the hollow portion thereof and acting against said projection J.

In witness whereof I have hereunto signed my naine in the presence of two subscribing Witnesses.

GEORGE H. E. SGHRADER.

Witnesses:

GEORGE H. FRASER, `THOMAS F. WALLACE. 

